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Civil Engineering :: Hydraulics

  1. A cylinder 3 m in diameter and 4 m long retains water one side as shown in the below figure. If the weight of the cylinder is 2000 kgf, the horizontal reaction at B is

  2. A.

    10,000 kgf

    B.

    15,000 kgf

    C.

    20,000 kgf

    D.

    18,000 kgf.


  3. Inside pressure in a hollow soap bubble in the air is : (where d is the diameter of the bubble)

  4. A.

    \(\frac {4\sigma } { d } \)

    B.

    \(\frac {2\sigma } { d } \)

    C.

    \(\frac {6\sigma } { d } \)

    D.

    \(\frac {8\sigma } { d } \)

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  5. The momentum correction factor (β) for the viscous flow through a circular pipe is

  6. A.

    1.25

    B.

    1.33

    C.

    1.50

    D.
    1.66
    E.

    2.00

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  7. A piezometer opening in pipes measures

  8. A.

    velocity head

    B.

    static pressure

    C.

    total pressure

    D.

    negative static pressure.

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  9. An independent mass of a fluid does not posses

  10. A.

    elevation energy

    B.

    kinetic energy

    C.
    pressure energy
    D.

    none of these.

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  11. While applying the Bernoulli's equation  \([\frac { p} { w } \) + z +\( \frac { V^2} { 2 g} \)]= total head, the work any section done on the flow system, if any

  12. A.

    is added on the right side of the equation

    B.

    is added on the left side of the equation

    C.

    is ignored

    D.
    none of these.

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  13. Discharge Q over a rectangular weir of length L and height H, is given by the equation

  14. A.

    Q = 2/3 C\(\sqrt{2g}\) LH3/2 

    B.

    Q = 2/3 CdL H\(\sqrt{2gH}\)

    C.

    Q = 2/3 cdH\(\sqrt{2gL^2H}\)

    D.

    all the above.

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  15. A short tube mouthpiece will not run full at its outlet if the head under which the orifice works, is

  16. A.

    less than 12.2 m of the water

    B.

    more than 12.2 m of the water

    C.

    equal of 12.2 m of water

    D.

    none of these.

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  17. Hydrostatic pressure on a dam depends upon its

  18. A.

    length

    B.

    depth

    C.
    shape
    D.

    material

    E.

    both (b) and (c).

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  19.   When two layers of a fluid separated by dy move over the other with a difference of velocity dv, causes a shearing stress , where u  is known as 

  20. A.

    coefficient of viscosity

    B.

    absolute viscosity

    C.

    dynamic viscosity

    D.

    viscosity

    E.

    all the above.

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